Speechdft-16-8-mono-5secs.wav

import librosa import librosa.display

y, sr = librosa.load('speechdft-16-8-mono-5secs.wav', sr=16000) speechdft-16-8-mono-5secs.wav

# ------------------------------------------------- # 1️⃣ Load the wav file # ------------------------------------------------- sr, audio_int = wavfile.read('speechdft-16-8-mono-5secs.wav') print(f'Sample rate: sr Hz') print(f'Data type: audio_int.dtype, shape: audio_int.shape') import librosa import librosa

# Parameters n_fft = 1024 hop_len = 512 n_mels = 40 import librosa import librosa.display y

# Frequency axis (Hz) freqs = np.fft.rfftfreq(N, d=1/sr)

# ------------------------------------------------- # 2️⃣ Convert 8‑bit unsigned PCM to float [-1, 1] # ------------------------------------------------- # 8‑bit PCM in wav files is typically unsigned (0‑255) audio_float = (audio_int.astype(np.float32) - 128) / 128.0 # now in [-1, 1]